342 using OptionalBase = typename std::conditional<  typedef
351 class optional : private OptionalBase<T>
357   constexpr bool initialized() const noexcept { return OptionalBase<T>::init_; }  in initialized()
358   T* dataptr() {  return std::addressof(OptionalBase<T>::storage_.value_); }  in dataptr()
359 …constexpr const T* dataptr() const { return detail_::static_addressof(OptionalBase<T>::storage_.va…  in dataptr()
362   constexpr const T& contained_val() const& { return OptionalBase<T>::storage_.value_; }  in contained_val()
364 …OPTIONAL_MUTABLE_CONSTEXPR T&& contained_val() && { return std::move(OptionalBase<T>::storage_.val…  in contained_val()
365   OPTIONAL_MUTABLE_CONSTEXPR T& contained_val() & { return OptionalBase<T>::storage_.value_; }  in contained_val()
367   T& contained_val() & { return OptionalBase<T>::storage_.value_; }  in contained_val()
368   T&& contained_val() && { return std::move(OptionalBase<T>::storage_.value_); }  in contained_val()
371   constexpr const T& contained_val() const { return OptionalBase<T>::storage_.value_; }  in contained_val()
372   T& contained_val() { return OptionalBase<T>::storage_.value_; }  in contained_val()
377     OptionalBase<T>::init_ = false;  in clear()
383     assert(!OptionalBase<T>::init_);  in initialize()
385     OptionalBase<T>::init_ = true;  in initialize()
391     assert(!OptionalBase<T>::init_);  in initialize()
393     OptionalBase<T>::init_ = true;  in initialize()
400   constexpr optional() noexcept : OptionalBase<T>()  {};  in optional()
401   constexpr optional(nullopt_t) noexcept : OptionalBase<T>() {};  in optional()
404   : OptionalBase<T>()  in optional()
408         OptionalBase<T>::init_ = true;  in optional()
413   : OptionalBase<T>()  in optional()
417         OptionalBase<T>::init_ = true;  in optional()
421   constexpr optional(const T& v) : OptionalBase<T>(v) {}  in optional()
423   constexpr optional(T&& v) : OptionalBase<T>(constexpr_move(v)) {}  in optional()
427   : OptionalBase<T>(in_place_t{}, constexpr_forward<Args>(args)...) {}  in optional()
431   : OptionalBase<T>(in_place_t{}, il, constexpr_forward<Args>(args)...) {}  in optional()